Communications (bi-directional)

• Signal (physiology)
• Beacon
  Beacon
  A beacon is an intentionally conspicuous device designed to attract attention to a specific location.Beacons can also be combined with semaphoric or other indicators to provide important information, such as the status of an airport, by the colour and rotational pattern of its airport beacon, or of...
  
  
• Distress signal
  Distress signal
  A distress signal is an internationally recognized means for obtaining help. Distress signals take the form of or are commonly made by using radio signals, displaying a visually detected item or illumination, or making an audible sound, from a distance....
  
  
• International maritime signal flags
  International maritime signal flags
  The system of international maritime signal flags is one system of flag signals representing individual letters of the alphabet in signals to or from ships...
  
  , using the International Code of Signals
  International Code of Signals
  The International Code of Signals is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp , flag semaphore, radiotelegraphy, and radiotelephony...
  
  
• Maritime flag signalling
  Maritime flag signalling
  Maritime flag signalling, generally flaghoist signalling, is the principal means other than radio by which ships communicate to each other or to shore; distinguished from flags showing nationality, ownership, or organizational status...
  
  , generally flaghoist signalling, by which ships communicate with each other
• Naval flag signalling
  Naval flag signalling
  Naval flag signalling covers various forms of flag signalling, such as semaphore or flaghoist, used by various navies; distinguished from maritime flag signalling by merchant or other non-naval vessels or flags used for identification.-History:...
  
  , covers various forms of flag signalling, such as semaphore or flaghoist
• Recognition signal
  Recognition signal
  A recognition signal is a signal where a person, a ship, an airplane or something else is recognized. They can be used during war or can be used to help the police recognize each other during undercover operations...
  
   in human, technical or biological communications
• Unix signal, a form of interprocess communication
• Signal (electronics), any time-varying or spatial-varying quantity
• Signals (military), military communications
• Signalling (telecommunications)
  Signalling (telecommunications)
  In telecommunication, signaling has the following meanings:*the use of signals for controlling communications...
  
  , a part of some communication protocols
• Smoke signal
  Smoke signal
  The smoke signal is one of the oldest forms of communication in recorded history. It is a form of visual communication used over long distance.-History and usage:...
  
  
• Telegraphic signal, in telegraphy
  Telegraphy
  Telegraphy is the long-distance transmission of messages via some form of signalling technology. Telegraphy requires messages to be converted to a code which is known to both sender and receiver...
  
  

Names

• Signal, Wyoming
• Signal (band)
  Signal (band)
  -Members:*Yordan Karadzhov - vocals, bass guitar*Vladimir Zahariev - drums*Alexander Marinovsky - guitar*Georgi Yanakiev - bass guitar-Discography:...
  
  , a Bulgarian rock band
• Signals (Rush album), 1982
• Signals (Mal Waldron album)
  Signals (Mal Waldron album)
  Signals is an album by American jazz pianist Mal Waldron featuring performances recorded in Baarn, Holland in 1971 and released on the Freedom label.-Reception:...
  
  , 1971
• Signal (album), a 2005 album by Casiopea
• "Signal" (song), a 2006 song by KAT-TUN
• Signal (1933), a New York Yiddish-language literary monthly published from 1933 to 1936 by the Communist Party USA
  Communist Party USA
  The Communist Party USA is a Marxist political party in the United States, established in 1919. It has a long, complex history that is closely related to the histories of similar communist parties worldwide and the U.S. labor movement....
  
  
• Signal (magazine)
  Signal (magazine)
  Signal was a magazine published by the German Wehrmacht from 1940 through 1945.Signal was a modern, glossy, illustrated photo journal and army propaganda tool, meant specifically for audiences in neutral, allied, and occupied countries. It was available in the United States in English until...
  
  , a Nazi propaganda magazine which was published in occupied Europe during World War II
• Signal (toothpaste)
  Signal (toothpaste)
  Signal is a toothpaste and a mouth wash produced by The Unilever company. Present in the market for over 40 years, it is available in over 48 countries.It was originally called Shield Toothpaste....
  
  
• Signal 1
  Signal 1
  Signal One is a British Independent Local Radio station broadcasting from studios in Shelton, Stoke-on-Trent to Staffordshire and Cheshire on 96.4 , 96.9 and 102.6 MHz FM for Cheshire, Stafford and North Staffordshire respectively. It also broadcasts on the Stoke "UTV-EMAP Stoke-on-Trent"...
  
   and Signal 2
  Signal 2
  Signal 2 is a British Independent Local Radio station broadcasting from studios in Shelton, Stoke-on-Trent to Staffordshire and Cheshire. The station is owned by UTV Radio and runs a "gold format" playlist. It is the sister station of Signal 1....
  
   radio stations
• Signaal (now Thales Nederland
  Thales Nederland
  Thales Nederland B.V. is a subsidiary of Thales Group involved primarily in naval defence systems...
  
  ), a Dutch defense company
• SIGNAL (programming language)
  SIGNAL (programming language)
  SIGNAL is a programming language based on synchronized data-flow : a process is a set of equations on elementary flows describing both data and control....
  
  , a synchronous programming language
• Signal Systems, a telecommunications company of the McLean Group of Companies
• Signal – The Southeast Electronic Music Festival, an annual music festival held in the United States
• Signal (novel)
  Signal (novel)
  Signal is a 2009 children's science fiction novel by Cynthia DeFelice. The book was a Junior Library Guild selection for 2009.-Synopsis:...
  
  , a 2009 children's novel about a boy who helps a girl from another planet signal her parents
• USS Signal
  USS Signal
  USS Signal is a name used more than once by the United States Navy, and may refer to:, an American Civil War gunboat in commission from 1862 to 1864, eventually burned and its crew captured., a World War II tanker in commission from 1944 to 1946...
  
  , the name of more than one U.S. Navy ship
• signal.h
  Signal.h
  signal.h is a header file defined in the C Standard Library to specify how a program handles signals while it executes. A signal can report some exceptional behavior within the program , or a signal can report some asynchronous event outside the program .A signal can be generated...
  
  , a C standard library header declaring the signal function

Other

• Signalling (economics)
  Signalling (economics)
  In economics, more precisely in contract theory, signalling is the idea that one party credibly conveys some information about itself to another party...
  
   in economic theory
• Signal (bridge)
  Signal (bridge)
  In the card game of contract bridge, partners defending against a contract may play particular cards in a manner which gives a signal or coded meaning to guide their subsequent card play; also referred to as carding.-Standard signals:...
  
  , partnership card games
• Signals in legal citations
  Legal citation signals
  Legal citation signals are a set of brief abbreviated phrases or words used to clarify the authority or significance of a legal citation as it relates to a proposition...
  
  
• Kent (game) a card game also known as Signal or Kemp

See also

• Telecommunications
• Signal velocity
  Signal velocity
  The signal velocity is the speed at which a wave carries information. It describes how quickly a message can be communicated between two separated parties...
  
  
• Morse code
  Morse code
  Morse code is a method of transmitting textual information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment...
  
  
• Encryption
  Encryption
  In cryptography, encryption is the process of transforming information using an algorithm to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. The result of the process is encrypted information...
  
  
• The Signal (disambiguation)